128780733313 has 2 divisors, whose sum is σ = 128780733314. Its totient is φ = 128780733312.

The previous prime is 128780733281. The next prime is 128780733317. The reversal of 128780733313 is 313337087821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119887677504 + 8893055809 = 346248^2 + 94303^2 .

It is a cyclic number.

It is not a de Polignac number, because 128780733313 - 2⁵ = 128780733281 is a prime.

It is not a weakly prime, because it can be changed into another prime (128780733317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64390366656 + 64390366657.

It is an arithmetic number, because the mean of its divisors is an integer number (64390366657).

Almost surely, 2^128780733313 is an apocalyptic number.

It is an amenable number.

128780733313 is a deficient number, since it is larger than the sum of its proper divisors (1).

128780733313 is an equidigital number, since it uses as much as digits as its factorization.

128780733313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 128780733313 in words is "one hundred twenty-eight billion, seven hundred eighty million, seven hundred thirty-three thousand, three hundred thirteen".